Friends vs Acquaintances, Frog vs Toad

It has been said that no man is an island and indeed, we are but a thread woven into the fabric of the society. As such, the fellow threads that reside beside us along with those that cross our paths are given special consideration over those that just remotely line the corners. The term "Friend" has been used countless times for this group of people but how many really know the words they use? A friend is one you place close to heart, someone you want to talk to, a person who you are willing to sacrifice for. For others, I recommend the term "Acquaintance". The difference between "friend" and "acquaintance" is just like the difference between a frog and a toad. They appear to be the same and in actual fact they are greatly similar but they are in essence still two different entities. Maybe its time I re-define the parameters and accord people their proper names.